Create Setup File Using InstallShield LE and unzip a file

Question

I have created a WPF application using VS 2010. I want to make installer file (exe) for this application.

This application also uses some other 3rd party files (bat files); which i have zipped. I want to unzip this file while installing and set the path of unzipped dir in Path variable also.

I have installed InstalledShield LE and able to create setup.exe  file.

 

I have added my zipped file in Application files (steps) 

But How to achieve unzipped part and setting environment vairable while making installer?